| Depth to Bottom of stage | PRESSURES at surface | ||
| Average Rock | Sound Rock | Weak Rock | |
| (metres) | (bar) | (bar) | (bar) |
| 3 | 0.5 | 1.5 | 0.5 |
| 6 | 2.0 | 4.5 | 1.0 |
| 9 | 2.5 | 5.0 | 1.5 |
| 12 | 3.5 | 6.0 | 2.5 |
| 15 | 4.5 | 7.5 | 3.0 |
| 18 | 5.5 | 9.5 | 3.5 |
| 21 | 6.5 | 10.5 | 4.0 |
| 24 | 7.0 | 12.5 | 4.5 |
| 27 | 8.0 | 14 | 5.0 |
| 31 | 9.0 | 14 | 5.5 |
| 34 | 9.5 | 14 | 6.0 |
| 37 | 10 | 14 | 6.5 |
| 40 | 10 | 14 | 7.0 |
| 43 | 10 | 14 | 7.5 |
| 46 | 10 | 14 | 8.0 |
| 46 | 10 | 14 | 8 |